Stumbles

SHAKERAG

1992 FORD 500

6 CYL

2WD

AUTOMATIC

188,000 MILES

1992 Ford E-150
cranks when cold really well. When at normal operating temp and is turned off it is very hard to start and emits lots of black smoke from tail pipe. It then hesitates off idle and sometimes goes dead. Once off idle it runs perfect.
I replaced fuel pump, drained fuel tank, fuel filter, electronic fuel pressure regulator, ignition sensor, plugs, wires, cap, rotor, fast idle air motor, O2 sensor.
Has not had cat for long time and the current problem just began
thanks--don